Computing evaluations

Go backward to The evaluation subgoal.
Go up to The selection space for multi-choice impasses.
Go forward to Halting Soar with success or failure.


Computing evaluations
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Independent of whether the evaluation is computed in a subgoal or a single
production, it must be computed.  There are two classes of evaluations,
symbolic and numeric.  The default knowledge provides support for processing
and comparing evaluations.

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